Improvement in stump-extractors



teniet %iaia Letters Patent No. 108,901, dated November 1, '1870.

IM PROVEMENT IN STUlViIL'EXTRATGRS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern.-

Be it known that I, LYMAN B. GIBSON, of South Addison, in 'the county ofSteuben and State of New York, have invented a certain new and usefulImprovementin Machines .for Extracting Stum'ps, applicable also tooth'er uses, of which the following is a specification.

Nature of the I n-oeniion.

This invention consists in an improved arrangement of the capstan andconnecting parts,as hereinafter described, whereby the sweep is easilyengaged or disengaged.

Also, in an improved arrangement of the tackle, blocks, and ratchet andpawl.

' Genera-l Description.'

In the drawingv Figure 1 is a perspective view of my improved niachine;V

Figure 2, a sectional elevation;

- Figure 3, a viewof the ratchet zuid pawl on the under side of theframe for holding the strain; and

Figure 4, a diagram, showing the arrangement of the wedge-block fordisengaging the the coupling.

A is the frame, which is braced, as shown, to revsist the greateststrain.

B is 'the capstan or windlass, mounted vertically thereon.

This capst-an is preferablyinade hollow, and at the top of the windingportion, for a short distance down, isl made straight, and it is thenmade in the form of the frustuni of a cone, so that the ropeor chain C,which winds thereon, will exert the greatest leverage en starting, andgradually decrease as it winds up more rapidly.

lhis is adapted to the nature of the. work, as the stump starts -hard atiirst, and gradually weakens as the roots loosen. y

D is the s\veep,of curvedor bent form, fitting in a socket, E. Y

This socket has a bearing, a', that iits loosely on the uppereiid ot'the capstan.

Both the eye of the bearing and the capstan on which it fits areslightly conical, so 'that when the bearing is raised, it will againfall in place when released. lhe socket and the capstan are bothprovided with a notched coupling, b, which, as 'the sweep goes forward,engages and thus imparts motion to the capstan, but as the sweep goesback, discngagesfthus releasing the capstan.

G is an linclined wedge-block, hinged at o, on top the frame, under theinner end of the sweep.

When lying fiat, as in iig. 1, the sweep passes over it withoutaffect-ing the coupling; but when the block is elevated, as in tig. 4,and the sweep is reversed by hack action, the latter will ride up theinclined plane l1, thus disengaging the coupling, and releasing theeapstan from the sweep. llllisis-frequently necessary, especially inworking in positions where but half a revolution ot' the sweep can'beattained, in which case, by successively backing up, andalternatelyengaging and releasing the coupling, the'worlg can beperformed. y

ln passing entirely around, it' the wedge-block stands elevated from thepoint of starting, the sweep will strike it from the rear, and throwit-,down automatically, requiring thus no special attention from theoperator.

H is a ratchet-wheel,secured to the lower end of4 thecapstan; and

I, a pawl, which engages therewith, the object being to hold the strainof the capstan when the .power Von the sweep is released.

" The pawl is operated by a doublecord or connection, j, passing throughloops g g,A and its ends attached to the stem ot' the pawl. By drawingone way or the other, the pawl will be thrown in or ont'ot gear.

lhe winding-cord C, from its attachment to the capstan, passes 'backover pulleyl, hung to the end oi' the frame, andV also connects withpulleys 2 3 of block K, and also pulleys 4 5, suspended above.

A variety ot connections with these pulleys may be attained; forinstance, as in iig. it may pass from pulley l over 4, thencedowiraround 3, thence up over 5, thence down around 2, and thence np tohanger k of pulley 4, to which it attaches; or, as in` tig. 2, fronrlaround 2, around 5, around 3,'aronnd 4, to point la', offblock K, whereit attaches.

Other arrangements of the vertical-adjustment of the rope or chainaround the pulleys may be made, t0 which it is unnecessary to referhere, rlhese several changes are essential in modifying the power, or inadapting to the stump, which is connected with block K, by a separatechain or rope passing around it.

lhis machine is also adapted for use horizontally; for insta-nee,removing buildings, Yby removing the supporting part of the fra-me,letting the latter down near the ground, and using a straight sweep. Inthis case a change in the arrangement of the winding-cord or chain 0 isinade. 1t passes over pulley 1, as before but the block K is carriedback horizontally past the machine, and the chain is carried around oneor the other of its pulleys 2 3, thence up to the end f the frame,either attaching there or passing around another pulley' there, andcarried back to the block and y attached to it.

Various modifications in the arrangement of the anni (tithe draft-chainor rope may'als'o be made here, but un# necessary to particula-rize, asthe operator will quickly eomprehendlhcm in use.

The pulley7 l is hung by a stirrup, m'to a staple, 11, by which it canadapt itself easily to'any incline that the rope makes in drawing thestumps.

Pulleys 4 5 are also hung by eyes p 1J, of simple bolt-rods. P P, havingalso eyes p' p above, but at v right angles to those below.

Through the upper eyes keysss are p-assed to hold them in place. Therods are kept from turning by means of the lower eyes resting incorresponding slots or sockets of `the wood-work.

.This arrangement of the pulleys 1 4 5, and method of connecting andhanging them, is oueof thenovel features of my invention. 4 That Iclaim, and desire to secure by Letters Patent, is-` 1. The sweep D,capstan B, rope or chain C, and pulleys 1, 2, 3, 4, and 5, arranged andoperating substantiall y as herein shown and described.

2. The capstan B, sweep D, coupling b, hinged wedged block G, ratchetandpawl H I, bolt-rods P P, and block K, when combined and 'operating incon-4 nection with the rope or chain C, and pulleys 1, 2, 3,

l 4, and 5, substantially as described.

3. In combination with the above, a connection, f, for operating thepawl, substantially as described, for the purpose setforth.

In witness whereof, I have hereunto signed my name in the presenceof twosubscribing witnesses. LYMAN B. GIBSON.

Witnesses:

WM. S. L, MUTTIAX, M. J. GIBSON.

